Derek is currently employed by the Croatian Fraternal Union as the Director of Fraternal Programs. Derek has many titles:
- President Board of Trustees CFU Lodge 354 of Cokeburg, PA.
- Delegate to the CFU Quadrennial Conventions.
- Director on the Board of the CFU Scholarship Foundation.
- Member of the Association of Croatian American Professionals (ACAP).
- Assistant instructor of the St. George Jr. Tamburitzans, member St.
- George Adult Tamburitza Ensemble.
- Accomplished tamburitza musician, Tamburaski Sastav “Barabe” and Jerry Grcevich Orchestra.
- Traveled to Croatia on eight occasions, mostly on tamburitzan concert tours.
- Met with every Croatian President and other top officials since Croatia became an independent state.